Oil-burning apparatus.



PATENTED APR. 30, -1907.

E. J. FOSTER. OIL BURNING APPARATUS. APPLICATION FILED JAN(16.190 6.

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UNITED STATES PATENT OFFICE.

EDGAR J. FOSTER, OF LOS ANGELES, CALIFORNIA, ASSIGN OR OF TWVO- THIRDS TO HENRY S. WVOOLNER,

OIL BURNING OF LOS ANGELES, CALIFORNIA.

APPARATUS- Patented April 30, 1907.

Application filed January 16, 1906. Serial No. 296,434.

To all whom it may concern:

Be it known that I, EDGAR J. FosTER, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Oil-Burning Apparatus, of which. the following is a specification.

This invention relates to an oil burning apparatus for use in connection with combustion chambers, such as fire boxes of boilers or bake ovens, and it relates particularly to the class of oil burning apparatus with a steam generating means for injecting or atomizing the oil, said generating means being formed as a part of the burner apparatus, and the main object of the invention is to provide against the deposition or accumulation of sediment, scale or alkali in the generator. In burner devices of this class, it is customary to extend the steam generator pipe into the combustion chamber in position to receive heat from the burner or from the chamher, and this pipe being necessarily bent, it is found that there is a tendency of the sediment, alkali or scale to accumulate in the bend or one leg or portion of the pipe, requiring frequent detachment, cleaning and renewal of the parts.

According to the present invention, the steam generator pipe is carried into the combustion chamber in such manner that only a single part thereof is subjected to the full heat of the chamber, and blow-out means is provided for said part to enable cleaning by blowing off steam therethrough as often as may be desirable.

The accompanying drawings illustrate the invention.

Figure 1 is a side elevation of the apparatus partly in section. Fig. 2 is a plan.

1 designates a combustion chamber or firebox, 2 the floor thereof which may consist of heat insulating tile or brick supported on a grating 3 above the ordinary ash pit 4.

5 designates the front wall, of the fire-box and 6 the front wall of the ash pit, both of which may be provided with doors in the usual manner. An opening 5 is formed in the front wall of the fire-box for the passage of the burner devices or burner heads 7, and opening 8 is formed in the wall 6 and the floor of the fire-box for the passage of the steam generator pipe or tube 11, said opening 8 extending preferably from the front of the the 1 box rearwardly a sufficient distance to enable the steam generator tube to be shoved backwardly in the slot open ng to its operative position. A firing pan 10 rests 011 the floor 2 and extends across this opening and underneath the steam generator pipe and the burner heads. The steam generator pipe 11 is connected at its inner or rear end to a riser 12 extending up through the floor of the combustion chamber and connected at its lower end to an ingoing water pipe 13 which extends forwardly from the bottom of said riser to the front wall of the ash pit and is connected exteriorly of said wall to a water supply pipe 14; a union l5 and cook 16 being provided to disconnect the pipe or to cut off the water supply thereto. The front end of the steam generator pipe 11 extends through the front Wall of the fire box and is provided with a fitting or joint 17 for connection to the burner heads and exteriorly of said fitting with a blow-off cock or valve 18. Pipes 19 extend from the fitting 17 through shut-off valves 20 to the respective steam nozzle pipes 21 of the respective burner heads. Each burner head is formed with a steam outlet or duct 22 in its lower portion opening into a recess or groove 23 in the front face of the head and communicating rearwardly into the steam pipe 21. The front end of the steam pipe is closed by a 'stufling-box 24 through which slides a cleaning pin 25 adapted to penetrate and clean the steam outlet. The burner head is further provided with an oil outlet extending forwardly into the groove or cavity' aforesaid and communicating rearwardly with an oil supply pipe 26, the respective oil supply pipes 26 being provided with needle valves 27 controlling communication through a common or joint oil supply pipe 28 provided with a union 29 and cook 30 for disconnection and shutting off.

In operation, the oil is turned on by the valves 27 and is lighted when it flows on to the firing pan, the heat of the flame heating the steam generator pipe sufficiently to gcncrate steam therein. The steam may then be turned on by opening valves 20 and will then atomize the oil, giving a hot jet or flame directed parallel to the steam generator pipe on each side thereof, thus heating the generator pipe equally on both sides and minimizing strains due to heating and deposition of scale thereon. The water pipe and riser are protected from the heat by the insulating floor of the chamber and by the firing pan, so that there is no deposition of scale or alkali in these parts, but the steam generator leg or part 11 is subjected to the full heat of the chamber and acts substantially as a flash boiler, so that all of the scale and alkali will be deposited therein, and may be blown out from time to time through the blow-off valve. The successful use of oil burners of this class with highly alkaline waters, has been greatly interfered with by the deposition of scale and alkali, and this invention disposes of the difficulty by confining the evaporator effect to a rough straight leg of the generator, which can be readily cleaned by blowing off. Such deposit as gradually accumulates in the form of a hard scale, can be removed by unscrewing the blow-off cock and cleaning the tube in the manner of a boiler tube.

In inserting the burner in place, the generator is pushed rearwardly, the riser passing back in the slot in the floor 2 and the firing pan is then placed under the generator tube and burner heads. In removing the burner, which will be frequently required with bake ovens, an opposite procedure is followed, the burner being either uncoupled by its unions, or having flexible pipe connections to enable its removal to one side.

- lVhat I claim is @5 31. In combination with a combustion chamber, having a heat insulating floor, a water pipe extending under the said floor and having a riser extending up through the floor, a steam generator pipe extending from said riser forwardly to and through the front wall of the chamber and provided with a bl ow-ofi valve at its outer end, two pipes extending laterally and oppositely from said steamgenerator pipe, and each provided with a shut off valve, a burner head for each pipe having a steam outlet connected to said pipe and an oil outlet above the steam outlet, and an oil pipe having branches provided with valves and connected \to the oil outlets of the burner heads, the burner heads being directed parallel to the steam generator pipe, on opposite sides thereof.

2. in combination with a combustion chamber having a heat insulating floor with a slot therein extending rearwardly from the front of the chamber, a water supply pipe having a shut off means, a pipe extending rearwardly from said water pipe, below the floor ofthe chamber, a riser extending up from the last named pipe through the aforesaid slot, a steam generator pipe extending forwardly from said riser, above said floor, to and through the front wall of the chamber, and provided at its front end with a blow-off valve, a burner head at one side of the steam generator pipe and having a steam outlet and an oil outlet above the steam outlet, a pipe having a valve and connected to the steam generator and to the steam outlet of the burner head, an oil supply pipe having a valve and connected to the outlet of the burner head, and a cleaner device slidably mounted in the burner headrto penetrate the steam outlet thereof.

In testimony whereof, I have hereunto set my hand at Los Angeles California this 6th day of January 1906.

EDGAR J. FOSTER.

In presence of ARTHUR P. KNIGHT, VERNA A. TALBERT. 

